Merge pull request pyocd#672 from avinashmehtadelhi/musca

Musca A, B related changes, update flash algo

Fixed failure to rename StlinkDetectWindows class.

- This caused STLink auto detection to completely fail on Windows.

Merge pull request pyocd#637 from flit/feature/wheel

Universal wheel generation

Merge pull request pyocd#606 from flit/bugfix/flash

Flash, test, and other fixes